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304A15 ✓ Verified by PartsTable
— · NUT WASHER
WHAT YOU NEED TO KNOW
Match nut grade to bolt grade for full strength Lock nuts prevent loosening under vibration
Don't mix grades — weakens the joint
PRODUCT OVERVIEW

The WASHER,SHOULDERED AND RECESSED is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, recess_angle: 67.0 DEGREES NOMINAL, hole_diameter: 0.219 INCHES NOMINAL IN, shoulder_height: 0.047 INCHES NOMINAL IN, outside_diameter: 0.750 INCHES NOMINAL IN, style_designator: SHOULDERED AND RECESSED. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-851-6255, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
304A15
NSN: 5310-00-851-6255
FSC: 5310
CAGE: 44940 — CUMMINS POWER GENERATION INC. (USA)
SPECIFICATIONS
materialSTEEL OVERALL
recess_angle67.0 DEGREES NOMINAL
hole_diameter0.219 INCHES NOMINAL IN
shoulder_height0.047 INCHES NOMINAL IN
outside_diameter0.750 INCHES NOMINAL IN
style_designatorSHOULDERED AND RECESSED
shoulder_diameter0.500 INCHES NOMINAL IN
surface_treatmentZINC AND CHROMATE OVERALL
material_thickness0.0229 INCHES NOMINAL IN
NSN5310-00-851-6255
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 304A15 · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
HOLE DIAMETER: 0.219 INCHES NOMINAL IN
•
STYLE DESIGNATOR: SHOULDERED AND RECESSED
•
SHOULDER DIAMETER: 0.500 INCHES NOMINAL IN
•
OUTSIDE DIAMETER: 0.750 INCHES NOMINAL IN
•
SHOULDER HEIGHT: 0.047 INCHES NOMINAL IN
•
RECESS ANGLE: 67.0 DEGREES NOMINAL
•
MATERIAL THICKNESS: 0.0229 INCHES NOMINAL IN
•
SURFACE TREATMENT: ZINC AND CHROMATE OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
HOLE DIAMETER0.219 INCHES NOMINAL IN
STYLE DESIGNATORSHOULDERED AND RECESSED
SHOULDER DIAMETER0.500 INCHES NOMINAL IN
OUTSIDE DIAMETER0.750 INCHES NOMINAL IN
SHOULDER HEIGHT0.047 INCHES NOMINAL IN
RECESS ANGLE67.0 DEGREES NOMINAL
MATERIAL THICKNESS0.0229 INCHES NOMINAL IN
SURFACE TREATMENTZINC AND CHROMATE OVERALL
MATERIALSTEEL OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
447851C1Interchangeable
interchangeable cross-reference
interchangeable
1GA9533BInterchangeable
interchangeable cross-reference
interchangeable
00304-0015Interchangeable
interchangeable cross-reference
interchangeable
30-400-15Interchangeable
interchangeable cross-reference
interchangeable
100981Interchangeable
interchangeable cross-reference
interchangeable
201154Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 304A15?
304A15 is a WASHER,SHOULDERED AND RECESSED.
What parts can replace 304A15?
There are 12 known substitutes for 304A15: 447851C1, 1GA9533B, 00304-0015 and 9 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 304A15?
304A15 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-851-6255. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026